I sure hope you find some place to donate them. I have a favorite thrift shop that I donate most of mine too. I used to drop off all my quilt magazines and quilt books to the library in their donate room. Usually, as I was filling up the to be shelved bin, people were pulling them out and leaving donations.
Now I have about 8 or 10 books that I use quite a bit. And less then 15 magazines. I do keep my quiltmaker block magazines. And, I'm only keeping them till I find the book of the first 10 years of magazines in one book. Then I will donate or give away what I have. I figure if I can make a block, I can make a quilt. And, google and Pinterest have so many ideas that I don't have to pack up my quilt shelf. Leaves more room for fabric, right!?